Pregnant goldfish

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I had 3 goldfish in my tank and last week, I added an oranda to the tank. As soon as it was added, the ...

I had 3 goldfish in my tank and last week, I added an oranda to the tank. As soon as it was added, the blackmoore started chasing it. I had no idea but I discovered reading online, that it means the fish's pregnant and that's why the other fish won't leave her alone. Now another one, a fantail is also chasing her.

I have no idea what to do, and I don't want to breed fish. I don't have another tank, and the current tank got no room for more. what do I do?

I had 3 goldfish in my tank and last week, I added an oranda to the tank. As soon as it was added, the blackmoore started chasing it. I had no idea but I discovered reading online, that it means the fish's pregnant and that's why the other fish won't leave her alone. Now another one, a fantail is also chasing her.

I have no idea what to do, and I don't want to breed fish. I don't have another tank, and the current tank got no room for more. what do I do?

Goldfish cannot get pregnant. You are looking for the term "berried" which means ripe with eggs. These are egglayers and breeding is not often observed in tanks. How big is your tank? Tankmates? More details needed here.

How did you know the genders of your goldfish? I've noticed you saying pronouns such as "her".

My tank is 55 gallon. I have a total of four goldfish and no live plants or other creatures.

The fish behaved Ok until I added the new one, which I didn't know the gender. I didn't know the gender of any of them, to be honest, but I noticed the behavior towards the new fish is different. The blackmoore and fantail started chasing the Oranda, shoving their face in the oranda's tail. The other one in the tank, a pearlscale doesn't seem interested, and it's minding its own business.

So, I was a little worried, because at first it seemed they were being aggressive towards the new one. But after reading online, it just fit the description of male chasing female bearing eggs. That's why I assumed the oranda was a female.